| abstract |
(57) [Summary] Formula (I) [Wherein, Ar is an optionally substituted aryl or C 5-7 cycloalkyldienyl group, or an optionally substituted monocyclic or condensed aromatic heterocyclic group, R, R 1 , R 2 and R 3 are as defined in the specification, or a solvate or salt thereof, a method for producing such a compound, and a pharmaceutical composition or a pharmaceutical composition containing such a compound. |